Question: The augmented matrix for a consistent linear system Ax = b has been reduced by row operations to the given row echelon form. 1 3


The augmented matrix for a consistent linear system Ax = b has been reduced by row operations to the given row echelon form. 1 3 1 1 0 O 0 1 0 4 0 0 0 1 0 0 O U 0 0 How many free variables does the linear system have
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